Fuel-mixing device



Oct. 6, 1931. l J. w. SMITH FUEL MIXING DEVICE Filed May 16, 1929 Lllll llllll lNvE TOR g BY MITTOREY Patented Oct. 6, 1931 srarES J CHN WILLIAMSMITH, F SYRACUSE, YORK FUEL-MIXNG- DEVICE Application led May 16,

This invention lrelates to miving devices in general and moreespecially to mixing 'devices for mixing air with fuel for use in furnaces,

y internal combustion engines and the like. f L rllhe present invention aims not only to pro- Tide a device which is suitable for-mining air lwith gasoline for use in an internalcombustion engine but alsoair with oil, or air with powdered Jfuel such as powdered coal andthe mlilew Y v 1.-, i v y Among the objects of the present invention it is also aimedjto provide animprovedconstruction of mixing conduit composed of two main units which nest into one another and term not only the mixing element but also vthe conduit itself. y, v

rllhese and other features, capabilitiesy and advantages orn the invention will appear from the subjoined detail ydescription of one specific embodiment thereof illustrated in the accompanying drawings in which Figure 1 is a plan View of amixing device made according to the present invention; Fig, 2 is a side elevation of the same; and Fig. 8 is a section on the line 3,-8 of Fig-2. 1n the embodiment illustrated, there are provided two main 'casting members 1 and 2 respectively which are complements of one another. rl`he members 1 and 2 areI substantially halt portions of a conduit which are adapted to be secured to one another to form a conduit. To secure the two sections to one another, the member 1 has an elongated flange 3 on one side thereof to register with the elonygated flange 4 on themember 2 and which are provided with alined recesses 5 and 6 respectively toreceive the bolts 7. The other side of the member 1 is similarly provided with an elongated fla-nge 8 which registers with and engages the flange 9 ot the member 2, and these flanges 8 and 9 are providedwith alined openings 10`and11 respectively to receve the bolts 12. c

The ends of they sections 1A and 2 orm with one another the cylindrical portions 13 and 14 Awhich are provided with the external threads 15 and 16 respectivelyto receive suitable couplings, not shown, toconnect the resulting mixing conduit by vconnecting' the end 15 with a suit-abley air and fuel supply; and

ieee. seran No. 363,632.

. as indicatedin the drawings, the wall 17 having formed thereon a plurality of rows 19 of interceptor blades and `the wall 18 having 65 formed thereon a plurality of rows 2O of interceptorV blades. lThe interceptorA blades of the rows 19 and 20 are lsubstantially identical yin dimension andfvtorm, the number of blades to each row being preferably the same.

vEach blade 21 consists of aV base triangular in iform having afront side 22 inalinement withf the rontside of the adjacent blade 21 of the row, the front sides 22y of a row of blades being preferably a straight line eX- tending transversely of the wall members 17,

l18. The front face 23 of each blade is substantially a triangle bounded by the edges 211 and 25 which converge to form the apex 26, the termination of the rear edge 27 of 80 4the blade 21, which rear edge 27 forms with vthe edge 2a a lateraltriangular face 28 and with the edge 25 a lateral triangular face 29. The lower end of the rear edges 27 of the blades21 of each row are in alinement with 85 one another and 4preferablyterminate on thek line in alinement with the lower front edges 22 of .the succeeding row of interceptor lades.y The apices26 ot each row of interceptor blades 21`r are preferably in alinement 90 withvone another extending transversely of the walls 17, 18, which line of apices is preterably, as illustrated, disposed a short distance in advance of the transverse line passing through thelower edges 27 of the blades 95 21. The blades oi' the row 20 directly oppo? .site to the blades of the row 19 are substantially identical in dimension and form, vsee F1a. 2-

For convenience ofdescrlptlon,` we w1ll Wl designate the blades of the row as 21 to distinguish them from the blades 21 of the row 19.

The blades 21 of the row 19 extend into the spaces formed between adjacent blades 21* of the row 20 to interlace with one another and, as clearly illustrated in Fig. 2, the apices 26 of the blades 21 are spaced a short distance from the inner face of the wall 18, and similarly the apices 26 of the blades 21a are disposed an equally short distance from the inner face of the wall 17. As clearly appears in Fig. 2, the front faces 23 of the blades 21 extend beyond the middle of the blades 21 with the apices 26 terminating in a line beyond the middle of the blades 21 and just a short distance in front of a plane passing through the inner ends of the rear edges 27 ofthe blades 21.

The walls 17, 18, forming the conduit, are provided with a series of successive rows 19 and 20 o f interceptor blades 21 and 21l respectively disposed one immediately adjacent to the other, substantiall f* the entire length of the conduit formed y the walls 17 and 18.

With this form of mixing conduit, certain definite physical forces are exercised on a stream or mixture flowing through the con- Y duit from the end 15 to the end 16. In order t0 have a definite mixture before us, let us assume, for instance, that the mixture is a mixture of oil and air for an oil burner. In such case, it is desirable that the oil be subdivided into the smallest particles possible so that it will form a veritable mist with the air with which it is being fed through the conduit. It has been found that the oil articles assume the form of small globules. ese globules can be broken up into smaller arts by being forced against an obstruction E impact. This is done by causing the globu es to strike against the front faces 23 of the blades 21 and 21. Next, it has been found that these globules can be further divided into smaller parts by a shearing action when caused to move along a sharp edge. To this end, the forwardly inclining edges 24 and 25 of the faces 23 form shearing edges so that the globules moving along these edges will be caused to be sheared olf into small articles. Due to the fact that the stream is rushing on in the direction of the end 16, the small globules striking each face 23 will sooner or later be caused to pass over such shearing ed e or over the apex 26 which will of course orm a similar shearing action. Furthermore, it has been found that when the natural fluctuation of the stream as it passes from one end of the conduit to the other is exaggerated to form a wave motion of considerable amplitude, the resulting change of pressure embracing a succession of chan es from high pressure to low pressure and ack to high pressure will aid in reducing the stability of the clobules so that they can be readily separated into iner particles by the impact faces 23 and shearing edgesl 24 and 25.

This action of successive changes of pressure from high pressure to low pressure and back to high pressure induced by the particular form of the blades 21 having the broad faces 23 opposing the movement of the stream with receding faces terminating in the rear edge 27 diverging from the path of movement of the stream to form an area ot low pressure. This area of low pressure ot' course is intensified by the fact that not only the blades 21 of the row 19 have such receding faces but likewise the opposing blades 21 of the row 21 are similarly constructed with receding rear faces.

This Wave action is further exaggerated by causing the particles of the stream to move from one row of blades 21 to the other row 19 of blades 21* and back to the other row 20 of blades, and back again to the succeeding row of blades and so on so that the wave action is not only in a longitudinal direction c consisting of successive alternate periods of compresslon and rarefaction but also in a lateral direction consisting of successive alternate movements from the right to the` left. This wave action is further accen` tuated by the interlacing of the blades ot each row with the blades of the opposite row so that the portion of the stream passing the area determined by two op osing rows 19 and 2() of blades consist of a p uralii.

ty of independent streams of matter moving in a plura ity of different waves which overlal one another.

t is obvious that various changes and modifications may be made to the details of y construction without departing from the general spirit of the invention as set forth in the appended claims.

claim: 1. A mixing device of the character described composed of two horizontal sections forming a conduit, each section having formed thereon a phlrality of rows of interceptor blades, the rows of blades of each section opposing one another and interlacing with one another, the blades having impact faces and receding rarefaction creating faces.

2. A mixing device of the character described consisting of two sections secured to.-`

one another and Vforming a conduit, each tion having formed thereon a plurality of rows of interceptor blades, each interceptor blade consisting of a triangular front face and two triangular rear faces, the blades of each section opposing the blades of the other section and interlacing with one another to form successive alternate areas of compression and rarefaction.

3. A mixing device of the character de scribed consisting of two sections secured to one another and forming a conduit, each section having formed thereon a plurality of rows of interceptor blades, each interceptor blade consisting of a triangular front face and two triangular rear faces, the blades of each section opposing the blades of the other section and interlacing with one another to form successive alternate areas of compression and rarefaction, the front edges of the bases of the blades of each row being disposed in a line transversely of the sections.

4c. A mixing device of the character described consisting of two sections secured to one another and forming a conduit, each section having formed thereon a plurality of rows of interseptor bla-des, each interceptor blade consisting of a triangular front face and two triangular rear faces, the blades of each section opposing the blades of the other section and interlacing with one another to form successive alternate areas of compression and rarefaction, the apices of the blades of each row being disposed in a line transversely of the sections. i

5. A mixing device of the character described consisting of two sections secured to one another and forming a conduit, each section having formed thereon a plurality of rows of interceptor blades, each interceptor blade consisting of a triangular front face and two triangular rear faces, the blades of each section opposing the blades of the other section and interlacing with one another to form successive alterna-te areas of compression and rarefaction, the front edges of the bases of the blades of each row being disposed in a line transversely of the sections, the apices of the blades of each row being disposed in a line transversely of the sections.

6. A mixing device of the character described consisting of two sections secured to one another and forming a conduit, each section having formed thereon a plurality of rows of interceptor blades, each interceptor blade consisting of a triangular front face and two triangular rear faces, the blades of each section opposing the blades of the other section and interlacing with one another to form successive alternate areas of compression and rarefaction, the apices of the blades of each row being disposed in a line transversely of the sections and to the rear of the middle of the blades of each row.

7. A mixing device of the character described consisting of two complemental castings secured to one another to form a conduit, the sections forming cylindrical ends and having external threads thereon, the intermediate portions of the sections being wider than the diameters of said ends and spaced apart a distance less than the diameter of said ends, each section having formed theren on a plurality of rows of interceptor blades, each interceptor blade consisting of a trian- 5 gular front face and two triangular rear section having formed thereon a plurality of rows of interceptor blades, each interceptor blade consisting of a triangular front face and two triangular rear faces, the tapered portion of each blade of a row on one section extending into the space formed between two adjacent blades of an opposite row on the other section, the resulting interlacing blades forming successive alternate areas of compression and rarefaction.

JOI-IN WILLIAM SMITH. 

